The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 2001
Filed:
Dec. 08, 1997
Joo-nyung Jang, Suwon, KR;
SamSung Electronics Co., Ltd., Suwon, KR;
Abstract
An optical demultiplexer for use in a low-power, high-density wavelength division multiplexing (WDM) optical transmission device has a plurality of optical wavelength filters. The optical wavelength filters each include a first input port for receiving a input optical signal, a first output port for outputting only an optical signal having a predetermined wavelength component in the input optical signal, and a second output port for outputting an optical signal having wavelength components other than the predetermined wavelength component. The second output ports of the optical wavelength filters are serially connected to the first output ports of their adjacent optical wavelength filters. Each optical wavelength filter receives an optical signal having a plurality of wavelength components, separates an optical signal having a predetermined wavelength component from the input optical signal, and outputs the optical signal having the predetermined wavelength component via the first output port thereof, and an optical signal having the other wavelength components other than the predetermined wavelength component to the input port of its adjacent optical wavelength filter, which is connected to its second output port, in order to separate an optical signal having another predetermined wavelength component.